Hello - Still works here with version 2018 on WIN 10 and version 12 on WIN 7. Is it possible that ESC has somehow been assigned to another function? That or conflict with another program? I'd restart the PC first to see if it fixes itself then move on to the other possibilities if needed.

Did this get resolved? I have the same condition on Windows 7 Pro, with Snagit 2018 most current as of today (3/19).Editing this. A second restart has resolved this condition. Esc now is working to cancel a screen capture.